95 lines
1.7 KiB
C
95 lines
1.7 KiB
C
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/*------------------------------------------------------------------
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*
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* File: rpack.h
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*
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* Purpose: Definition of Garmin Rino message format.
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*
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* References: http://www.radio-active.net.au/web3/APRS/Resources/RINO
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*
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* http://www.radio-active.net.au/web3/APRS/Resources/RINO/OnAir
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*
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*---------------------------------------------------------------*/
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#ifndef RPACK_H
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#define RPACK_H 1
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#define RPACK_FRAME_LEN 168
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#ifdef RPACK_C /* Expose private details */
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// Transmission order is LSB first.
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struct __attribute__((__packed__)) rpack_s {
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int lat; // Latitude.
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// Signed integer. Scaled by 2**30/90.
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int lon; // Longitude. Same encoding.
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char unknown1; // Unproven theory: altitude.
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char unknown2;
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unsigned name0:6; // 10 character name.
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unsigned name1:6; // Bit packing is implementation dependent.
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unsigned name2:6; // Should rewrite to be more portable.
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unsigned name3:6;
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unsigned name4:6;
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unsigned name5:6;
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unsigned name6:6;
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unsigned name7:6;
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unsigned name8:6;
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unsigned name9:6;
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unsigned symbol:5;
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unsigned unknown3:7;
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// unsigned crc:16; // Safe bet this is CRC for error checking.
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unsigned char crc1;
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unsigned char crc2;
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char dummy[3]; // Total size should be 24 bytes if no gaps.
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};
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#else /* Show only public interface. */
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struct rpack_s {
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char stuff[24];
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};
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#endif
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void rpack_set_bit (struct rpack_s *rp, int position, int value);
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int rpack_is_valid (struct rpack_s *rp);
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int rpack_get_bit (struct rpack_s *rp, int position);
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double rpack_get_lat (struct rpack_s *rp);
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double rpack_get_lon (struct rpack_s *rp);
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int rpack_get_symbol (struct rpack_s *rp);
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void rpack_get_name (struct rpack_s *rp, char *str);
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#endif
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/* end rpack.h */
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